SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 CG18

2016 CG18

2016 CG18 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.983 AU and a period of 0.97 yr.

Aten Observations: 106
Orbital Period · P
0.97 yr
v(q)
33 km/s
v(Q)
27.4 km/s
Diameter · ≈
0.01 km
TJ
6.16
Eccentricity · e
0.0922

Orbit and dynamics

Between its closest point (0.892 AU) and its farthest (1.073 AU), the heliocentric distance changes by 0.181 AU over every revolution.

One full revolution takes 0.97 yr (356 days), computed from the semi-major axis of 0.983 AU.

With e = 0.092, the orbit is close to circular.

The orbital plane is tilted 5.7° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33 km/s at perihelion and falls to 27.4 km/s at aphelion.

Because q < 1 AU and Q > 1 AU, this orbit geometrically intersects the region of Earth's orbit.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 28.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 106 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4084 arcseconds.

Condition code U = 4 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
0.9828 AU
Eccentricity
0.0922
Perihelion
0.892 AU
Aphelion
1.073414 AU
Inclination
5.7°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
133.14°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2050-Sep-06 02:50 0.131394 AU
19656297 km
7.75 km/s
2051-Aug-23 17:01 0.034717 AU
5193661 km
4.04 km/s
2052-Jun-26 17:24 0.122915 AU
18387758 km
3.69 km/s
2054-Feb-05 07:39 0.000035 AU
5220 km
4.14 km/s
2055-Feb-03 03:18 0.004239 AU
634138 km
6.14 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
28.5

Orbit Quality

RMS
0.4084
Condition
4
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Keep exploring

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